Here are the extended Fokker diatonic names for the intervals less than an octave 
available in Blackjack.
Just add seven to the number in the name when you widen it by an octave.
e.g. 200 cents is a major second so 1400 cents is a major ninth.

Legend for interval name abbreviations:

1 unison
2 second
3 third
4 fourth
5 fifth
6 sixth
7 seventh
8 octave

m = minor
N = neutral
M = major

d = diminished
P = perfect
A = augmented

s = sub
S = super

n = narrow
W = wide

Legend for note names:

A,B,C,D,E,F,G,#,b as for 12-tET
] = quarter-tone up   (+50 c)
> = sixth-tone   up   (+33 c)
^ = twelfth-tone up   (+17 c)
v = twelfth-tone down (-17 c)
< = sixth-tone   down (-33 c)
[ = quarter-tone down (-50 c)

Intervals in Blackjack (A 21 note chain of 7/72 oct generators)

No.	Width	Abbrev	Example	11-limit  Full name
gens    (cents) name		ratio
----------------------------------------------------------------
0	0	  P1	G:G	1:1       perfect unison
-10	33	  S1	D:D>	          super unison
-20	67	nsm2	Bb^:Bv	          narrow subminor second
11	83	 sm2	G:G#v	          subminor second
1	117	  m2	G:Ab^	          minor second
-9	150	  N2	D:E[	11:12     neutral second
-19	183	 nM2	A:Bv	9:10      narrow major second
12	200	  M2	G:A	8:9       major second
2	233	 SM2	G:A>	7:8       supermajor second
-8	267	 sm3	D:F<	6:7       subminor third
-18	300	 nm3	A:C	          narrow minor third
13	317	  m3	G:Bb^	5:6       minor third
3	350	  N3	G:B[	9:11      neutral third
-7	383	  M3	G:Bv	4:5       major third
-17	417	nSM3	A:Db^	11:14     narrow supermajor third
14	433	 SM3	C:E>	7:9       supermajor third
4	467	  s4	G:C<	          sub fourth
-6	500	  P4	G:C	3:4       perfect fourth
-16	533	 nS4	A:D>	          narrow super fourth
15	550	  S4	C:F]	8:11      super fourth
5	583	  A4	G:C#v	5:7       augmented fourth
-5	617	  d5	G:Db^	7:10      diminished fifth
-15	650	  s5	A:E[	11:16     sub fifth
16	667	 Ws5	C:G<	          wide sub fifth
6	700	  P5	G:D	2:3       perfect fifth
-4	733	  S5	G:D>	          super fifth
-14	767	 sm6	A:F<	9:14      subminor sixth
17	783	Wsm6	C:G#v	7:11      wide subminor sixth
7	817	  m6	G:Eb^	5:8       minor sixth
-3	850	  N6	G:E[	11:18     neutral sixth
-13	883	  M6	D:Bv	3:5       major sixth
18	900	 WM6	C:A	          wide major sixth
8	933	 SM6	G:E>	7:12      supermajor sixth
-2	967	 sm7	G:F<	4:7       subminor seventh
-12	1000	  m7	D:C	9:16      minor seventh
19	1017	 Wm7	C:Bb^	5:9       wide minor seventh
9	1050	  N7	G:F]	6:11      neutral seventh
-1	1083	  M7	G:F#v	          major seventh
-11	1117	 SM7	D:Db^	          super major seventh
20	1133	WSM7	Bv:Bb^	          wide super major seventh
10	1167	  s8	G:G<	          sub octave

Note that, the same interval may have more than one name 
consistent with this system, I'm sorry I haven't yet listed any of these alternatives.

Regards,
-- Dave Keenan, 1-Feb-2002, last updated 8-Feb-2002